schenic



C. J. SCHENK.

DOUBLE ACHNG PUMP HEAD.'

APPLICATION FILED AFR. 3. i919.

mama-Nov. 18, 191g 2 SHEETS-SHEE yl.

and

@.1. SQHENKL n DOUBLE ACTING PUMP Hmm APPUCAT'ION FILED lAPR. 3, 1919.

' Patented Nov. 18,.'1919.

2 SHEETS-SHEET 2 CHARLES J. SCHENK, OF RUNNINGTON, CALIFORNIA.-

DOUBLE-ACTING PUMP-HEAD.

Specification of Letters Patent.

Appiication inea Aprii 3,191'9. e seriai 116.287,191.

To LH whom. 'it may concern:

lie it known that l, Cimiinizs J. Soi-IENK, a citizen of the United Statemresiding at Runiiington. in `the county. of Kern and State of California, have, invented new and useful Improvements in Double Acting Pinup-Heads, of Wliichjthe followingvis 'a specification.V l 4 -I j My object is to maken long strokedouble acting pump head providinga continuously uniform fiow,.and-imy invention consists of'.

'pumpcasing 19 are in a vertical' line, the rollers 14 and 18 are in a vertical line, and the-rollers .13 and 17 are in a vertical line. t "i The inner .pump rod 21' works inside of the outer pump rod 22, and thelower pump' Patented Nov. 118, 19195,

rod 22 works through a stuffing.,boirconV-l' struction 23 fixed vat 'y the upper endfof the'A 2. .A gear rack 24v isf'c I ected to the upper end of the-in'nerpmn'l rodz 21 byfsclainpsjand .bolts 25. *The gear racks-26 an 7 'econnectedeto'theupper' the novel features herein shown, describedA end of the outei'pi1np'rod22 by clampsfand A2 in Fig. 1.

Fig. 3 is a rear elevation as seen lookingv inthe direction indicated by thearrow 3 in Fig. 1. 1

Fig. 4 is .an enlarged perspective showing the mutilated gears and gear racks.

Fig. 5 is a 'fragmentary sectional detail of the upper mutilated gear shown in Fig. 4 and showing one of the spring catch teeth. The base 1, 's rectangular in yplan and supports the upper `end of the pump casing-2, and the spout jlleads the liquid lfrom the pump casing 2. llPosts 4 and 5 arey rigidly mounted upon one side of the base '1, and similar posts G-and 7 are rigidly mounted upon the other side of the base 1. A brace 8 co 'nects theupper ends of the posts 4 and 5, a brace., 9 connects the intermediate portions of the posts, and a brace 10 connects the lower ends. Similar braces connect the posts 6 and 7 together. A brace .11- connects the intermediate parts of the posts 4 and 6 together, and a similar brace 12 (onnects the-interinediate arts of the posts 5 and 7 together. Gui e rollers l13, 14 and 15 are mounted between the upper ends of the posts 5 and 7 upon a' spindle 16. Similar guide lrollers 17, lgfand v19 are mounted sonic distance below the Aspindle 16 upon a spindle-20. The rollers/15 and .bolts 28,. ,c The gear racks y24, .26 fand 27 'are sli 'ghtlyfspaced apart and in a" "straight line. The back-smooth side of thel gear-rack 24' runs in the rollers '.14 ',z`ind-18`,` andthe back smoothsidesoi 'the geari'a 26and 27 run in the rollers 13 and 17 and 15 and.19. The l lgear teeth ofjtlie racks are at the opposite sides from tli'e smooth sid es "which run upon the rollers,l the rollers sciifingf to hold the|` racks in their proper'tracks to mesh with the .mutilatedgefus. .Ik

.The lifting. shaft 29 isy mounted in thel braces 9, a drivepulley() isiixed uponthe outer end of thefdrive shaft, the mutilated gear 31 is; fixed upon the lifting .shaft 29 in line with the gear vracks, said mutilated gear having alk segment 32 meshing with driving shaft 35 is mounted ,1in the braces Q parallel with ythe 'lifting shaft 29, and a long faced pinion 36 vis fixed upon the driv, ing shaft to mesh with the mutilal gear 31. The segnients 32,' 33 and 34 form a continuous gear in mesh Vwith the long faced pinion 36. A 4pinion 37 is fixed upon the driving shaft 35 in a. plane at one side of. the gear racks. mounted upon'an idler shaft{9,'said idler shaft being mounted in bearings n'ear the upper ends of the posts 4 andG and the idler gear l38 meshing with the pinion 37', and a gear 40 meshes with the lidler gear 38. A gear 40 is fixed upon one side of the mutilatedjgear 41 by bolts 42 extending through-slots 43, so that the gear 40 may be adjusted relative to vthe mutilated gear 41' the gear rack 24, and segmentsl and 84 Anidler gear 38 is 47 .serve the 327 the segments 46 and ments 46 and 47. Bevel faced teeth 64 extend from the 'ends-otie seg-- 55 gear 41 has a segment 45 adapted to mesh with the gear rack 24and segments 46 and' 47 adapted to mesh with the geariracks 26 and27. The lifting shaft 29 carrying the mutilated gear 31 moves in the direction indicated by the arrow 48, and the driving shaft 35 carrying the gears 36 and 37 moves in the `opposite dlrection as indicated bythe arrow 49, and the idler gear 38 meshin with the gear 37 goes in the direction in icated by thev arrow 50, and the mutilated gear 41 moves in the direction indicated by the ar row 51 so that the mutilated gear 31 moves. in the opposite direction from the'mutllated gearv (51. Y

There is a break 52 between the ends of the segment 32 and breaks 53 and-54 between.

the ends 'of the-segments 33 and-2234:, In a. like manner there 1s a break' lifbetween the -ends of the segment 45v and breaks `56-`and 57 between the ends of the segments 46 and 47. The racks 26 and 27 serve the purpose of a. single rack, the object beihg to divide the strain and *balance the pull upon the outer pump rod 2 2, and in a. llke manner the segments 33 and 34 and the segments46nd purpose of single segments. The gears and racks 'are set vand timed so that the mutilated gear.. 31 drives theracks 24, 26 and- 27 upwardly' and the mutilated gear 41 drivesthe racks downwardly',` and so that when the segment 3l is in mesh with the rack-24 and driving the rack 24 upwardly to raise the pum rod- 21 the segments'. 46 and 47 are in mes with the 'rabks 26 and 27 and driving'the racks downwardlyto lower the outer, pump rodi-"22, and when the se ment 32 reaches thj'end of the downstrole the segment 35 takgfs hold ofthe rack 24 and starts the upstrokegof the and in a like manner when the segments .33 and 34. reach the upstroke of the racks 26 andl 47 'take hold and start the down stroke.

Breaks 58 and 59 are formed in the racks 26 and 27 between the teeth 60 and 61 which mesh with the segments 33 and 34 and the teeth 62 and 63 which mesh with. the vSegments 46 and 47 to tin double width tooth 65 is formed diretly behind each catch-tooth to lit in the break 59 to avoid the shock which would otherwise result when the segments 33 and 34 run out of mesh and the segments 46 and 47 run into mesh, thereby reversing the motion'of the the breaks 58, and a racks. In a. like manner a. bevel -faced spring catch tooth 66 anda wide-space'67 and then'as 'the inner pum'p 'rod 21,

"ments 33 and 34,

'is formed attheend of the segment 45 to mesh with thecorresponding. breaks in the rack y24. l ,l Referringto Fig. 5, a recess 68 is formed from the peripheral face ofthe casting forming therack the rack, a bore 69 extends inwardly'from the recess 68, and a second bore 7 0 extends inwardly from'the bore 69.` The bevel faced spring catchtooth 64 fits in the rece 68, a spring 71 fits against 64 in the bore, 69, and a stem-72 extends from 47 and at the forwardend of y the lback of`v the tooth" l the back of the tooth 64 through the'spring f 7l intothe bore through. th'e 'body and through Va slot 74 lin the 'tooth 64 to limit the outward, move/ff Atthe time the rack '27 is'rbeing lifted by f ,v the rack,34 and tisV about at'the endof its ment. of the tooth. n 1

70. A pin-73 extends" upward-movementthe mutilated gear 41fis movlng in the direction indicated byl-.the arf row 75, alnd the rackf27fismoving the" the'arrow 16, and the" direction indicated by. segment 34de about to p. SPnPg the' double width' tooth lthe breaks .58?and 59 the break .58 ho jd catch tooth 64 passesl 74".i.or`m`ed4 between f pressed inwardlyfagainst the tension ofthe' ff 'spring 71and sna Ybehind'the tooth,7 ?into v the 27from. falling when the segrx'ierit34lets IAThen 'continis,

ned aetionlgayilibringfthe maar 65 'into the break 59and,tliechange from the upward-v,

^ movement :of the rack 27 :to the 'downward-L;

movement is made without' any shock and'4 vithoutanyg'danger. of breaking 'the gear segment 46 makes rack 26, and when the In al'ike manner:

connectionv with the -motion is 'reversed-and the`rack 24 up and) ready to startdown 66 makes connection with the .rack24` rIfhe segment 32 of and 78, 79,' .32 and 80 and the corresponding ends of vthe segthe spring catch toothVL the mutilated gearv 31,- f' overlaps at both ends with the segments 33l 34,` thus producingA the long' gear teeth. 81 at onelend of the segmentp 5110) andasunilar long teeth 82,-

83, s4 and a5 at theopposite ends of the three 5 segments. The 'result is an movement -of the. When the mutilated overlapping gear 31 is in the position Pmp rods mand 22.

approximately' as shown in Fig.'f4, .the seg- Av j ments 33 and 34 are lifting the 'racks 26 and 27 and are near lthe upper ends' of "the 'movements of the racks, and before .the extreme upper movement ceases the segment 32 takes" hold of the., rack 24, and during -t-helltravel `82 all threeA 0f the gear teeth 8 5, 84,83 arid racks are moving upwardly thereby lifting both vot and 22 at the -same ti-me.

tile-.pump

Then as the. teeth `82 go' out of mesh with the racks 26 andf2j7' the. rack Q4. proceeds upon the upward movementwhilc the racks 2G and 2-7 are reversedvv and lou-ered hy thel mutilated gear '-ll, and in the same manner when the mutilated gear 31 -has made substantially a. half revolution the rack 2l is near the end'of its upward stroke and before the end ofthe up'ward stroke. of the rack 24 is reached the gear teeth TS take -hold ot' the racks 26 and 27 and start the upward stroke of said racks 26 and 2T. and the result is a continuous even flow from the pump.'

it were not for these overlapping ends of the segments $32, 855 andl both pum rods A2i and QQ. would come to a standstill' and each end of their movements thus interrupting the flow twice at each complete cycle of the pump.

The column of water or oil flowing from the pump will move continuously and uniformly7 at the rate of thirteen inches per second `with a mutilated gear 31 revolving at the rate of thirty revolutions per minute.A

it were not for the overlapping of the segments the column of fluid would come to a standstill twice at each vrevolution of thev gear 31, and twice vat each revolution of this gear the machinery would come up against the dead load of the still column of iiuid at' thc rate of thirtegi inches per second.

The pitch speed-of the mutilated gear 4l is nearly twice the pitch speed of the mutilated gear 31', so that the racks will go down and the pump rods will go down nearly twice as fast as they go up, and the weight of the descending pump `rod is hung u on the periphery of a gear nearly twice as arge as the gear upon which the ascending pump rod is hung, so that the weight of the descending pump rod will assist in counterhalancing the weight of the ascending iump rod carrying the load offthe column o iiuid.

Thus I have. produced a double acting long stroke pump head providing a continuously uniform How having few and strong durable parts, easily assembled, easily made and easily repaired.

Various changes may be made Without departing from the spirit of my invention as claimed. 'of' l claim:

l. T he combination with a double acting pump having an inner pump'rod andan outer pump red, of a gear rack connected to the inner pump rod. mating gear racks con-' mated to the outer pump rod one on each side of the tirst gear rack, a mutilated gear adapted to mesh alternately' with the gear rack connected to the inner pump rod and the gear racks connected to the outer pump rod as required to raise the gear racks to operate the pump rods upwardly alteimatcly, a second mutilated geur'adaptod to mosh 'witlrthe gear rack connected to the inner pump rod and the gear racks connected to the outer pump rod alternately as required to lower the pump rods, and a driving shaft.

and gearingl connecting the mutilated gears for continuous operation. c.

2. The combination with a double acting pump having aninner pump rod and an outer pump rod, cfa gear rack connected to the inner pump rod, mating gear racks con nected to the outer pump rod one on each side of the rst gear rack, a mutilated gear .adapted to. lower the pump rods, a .driving shaft,

gearing connecting the driving shaft Vand the mutilated gearsf for continuous operation,

and means'for accurately adjusting the i geared connection b tween-the two mutilated 3. The combination'with a double acting pump having an inner pump rod and an outer pump rod, of a gear rack connected to the inner pump rod, mating gear racks connected tothe outer pump rod one on each sidecfthe first gear rack, armutilated gear adapted to mesh alternately-withthe first gear rack and with'v the second gear racks to operate thepump rods upwardly alternately, al second mutilated -gear adapted to mesh with the iirst gear rack and-with the second gear racks 'alternately as` required to lower the -pump rods, the second mutilated gear having bevel t'aced spring catch teeth4 to mesh with the gear racks at the beginning ot the downward movements.l and a driving shaft and gearing connecting the mutilated gears for continuous operation.

4. The combination with a vdouble act-ing pump having an inner pump rod and au outer pump Tod, of a gear rack connected to the inner pump' rod, mat-ing gear racks connected to the outer pump rod one on each side Iof the firstgear rack, a mutilated gear having overlapping segments adapted to mesh alternately with'the first gear rack and with4 the second gear racks as required to voverlap the n'xovements of the pump rod 1-SD gear adapted to mesh ,pump having an inner puin I rod end-'an outer pump md, of a geel` iac connected to the inner pump rod, mating gear racks connested to the outer pump rod one. on each reeks alternately, said segments having bevel faced spring catch teeth at their forward ends to snap into the gear racks at the ginning of their downward movements, anrl a driving shaft and gearing connecting the 412s mutilated gears for continuous ope1ation.

In testimony whereof I have signeglz." name to this'peoifcation.

CHARLES J. SCHENK; 

